大约有 43,000 项符合查询结果（耗时：0.0488秒） [XML]
Shorthand way for assigning a single field in a record, while copying the rest of the fields?
...
And lenses-like packages often define operators in addition to functions for getting and setting fields. For example, test $ c .~ "Goodbye" is how lens would do it iirc. I'm not saying this is intutitive, but once you know ...
Why do we usually use || over |? What is the difference?
...
If you use the || and && forms, rather than the | and & forms of these operators, Java will not bother to evaluate the right-hand operand alone.
It's a matter of if you want to short-circuit the evaluation or not -- most of the ti...
Why doesn't java.util.Set have get(int index)?
... itself. Two of the three commonly used implementations of List (ArrayList and Vector) are random-access, but that does not make random access a property of Lists.
– Michael Myers♦
Aug 5 '12 at 4:29
...
Can you explain the concept of streams?
I understand that a stream is a representation of a sequence of bytes. Each stream provides means for reading and writing bytes to its given backing store. But what is the point of the stream? Why isn't the backing store itself what we interact with?
...
Is there a fixed sized queue which removes excessive elements?
I need a queue with a fixed size. When I add an element and the queue is full, it should automatically remove the oldest element.
...
List View Filter Android
I have created a list view in android and I want to add edit text above the list and when the user enter text the list will be filtered according to user input
...
How do I obtain the frequencies of each value in an FFT?
... an FFT result. These are stored in two double arrays: a real part array and an imaginary part array. How do I determine the frequencies that correspond to each element in these arrays?
...
How do you sort a dictionary by value?
...consisting of keys & values, by value. For example, I have a hash of words and respective frequencies, that I want to order by frequency.
...
How different is Objective-C from C++? [closed]
What are the main differences between Objective-C and C++ in terms of the syntax, features, paradigms, frameworks and libraries?
...
Why is processing a sorted array faster than processing an unsorted array?
...e long distance or radio communication.
You are the operator of a junction and you hear a train coming. You have no idea which way it is supposed to go. You stop the train to ask the driver which direction they want. And then you set the switch appropriately.
Trains are heavy and have a lot of inert...